Folding apparatus

ABSTRACT

A web transferring, cutting and folding apparatus shiftable between two modes of operation for producing from a continuous web, either two streams of eight page sections or one stream of 16 page sections. In the first mode, two triangular formers double and redouble the web about its longitudinal axis. Then it is cut into single width, double length and finally single width, single length eight page sections which are alternately forwarded to separate streams. In the second mode, one triangular former doubles the web about its longitudinal axis. Then it is cut into double length, double width sections which are next folded into single length double width sections transversally and forwarded in one stream to a right angle folding unit which folds these sections about the longitudinal axis into single length, single width 16 page sections. In shifting between the two modes, most of the apparatus is relatively rotated 90* to alternatively utilize or by pass the one of the two triangular formers.

nite ttesl te Takayanagi et al.

r451 Jan.a,1974

[ 4] FOLDING APPARATUS Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, Japan[22] Filed: Dec. 29, 1970 [21] Appl. No.: 102,341

[73] Assignee:

Foreign Application Priority Data FOREIGN PATENTS OR APPLICATIONS1,204,689 11/1965 Germany 270/63 Primary Examiner-Robert W. MichellAssistant Examiner-L. R. Oremland Att0rney-Cushman, Darby & Cushman [57] ABSTRACT A web transferring, cutting and folding apparatus shiftablebetween two modes of operation for producing from a continuous web,either two streams of eight page sections or one stream of 16 pagesections. In the first mode, two triangular formers double and redoublethe web about its longitudinal axis. Then it is cut into single width,double length and finally single width, single length eight pagesections which are alternately forwarded to separate streams. In thesecond mode, one triangular former doubles the web about itslongitudinal axis. Then it is cut into double length, double widthsections which are next folded into sin gle length double width sectionstransversally and forwarded in one stream to a right angle folding unitwhich folds these sections about the longitudinal axis into singlelength, single width 16 page sections/1n shifting between the two modes,most of the apparatus is relatively rotated 90 to alternatively utilizeor by pass the one of the two triangular formers.

2 Claims, 4 Drawing Figures Pmmew 8:914 3.784.187

SHEE! 2 (l? 2 INVENTORS ATTORNEYS FOLDING APPARATUS FIELD or THEINVENTION This invention relates to a folding apparatus for folding theweb which is continuously printed as by a rotary press and dischargedout to be folded, and more specifically to improvements of foldingapparatus. which make it possible to obtain 8- and l6-page sections on asingle folder unit.

BACKGROUND OF THE INVENTION With an ordinary folding apparatus of thistype it is necessary to use a low speed for conveying the sections, or alow machine speed, if the sections are to be finished. within theallowance for folding accuracy ($1.0 1.5 mm) as required by thesubsequent bookbinding process.

The sections which are carried by conveying means through triangularformers, serrated cutters and folding cylinders, undergo complicatechanges in the posture and direction as a brake is applied thereon bythe tips of choppers which move the sections up and down thereby foldingthemat right angles in the course of conveyance, and also because thesections are caused to hit stoppers provided at the end of the rightangle folding apparatus for the purpose of stoppng the sections to besubjected to right angle folding. As a result,

the right-angled folding lines are randomly changed with individualsections and the right angle folding accuracy is unfavorably affected,Therefore, if the folding accuracy on an existing apparatus is to bemaintained within the specified limits, then the speed at which themachine runs must be kept low, thus posing a produc-. tivity problem. Itis also noted that, while a common practice in the art has been to foldprinted paper first into two or 4 pages by a traingular former, and theninto two or 8 pages by a parallel folder, and finally into two or 16pages by a right-angled to folder, a recent tendency is a steadyincrease in demand for multi-color S-page sections due to growingpopularity of multicolor high grade printing by rotary presses. However,no practical folder has been introduced yet that meets the latterrequirementand a makeshift practice being resorted to is to divide thel6-page sections obtained in the conventional way into two 8-pagesections by hand. This is a disadvantage because it needs much manuallabor and consumes much of the valuable time for the publications,particularly weekly magazines, which must go off the press as promptlyas possible for distribution in time.

This invention resides in a folding apparatus comprising a firsttriangular former, a second triangular former provided downstream of thefirst triangular former and alongside the path of the web, in thedirection to cross the first triangular former, a folding cylinderdisposed at right angles to the path of the web downstream of the secondtriangular former and which has serration receivers, needles, andfolding blades operation for obtaining 8-page sections, a first serratedcutter having serrations which is located parallelly alog one side ofthe folding cylinder, a second serrated cutter having needles andserrations in vertically spaced relationship and which is locatedparallelly along the other side of the folding cylinder, a grippingcylinder having needles and grippers for obtaining 8-page sections, twosets each of section conveyors engaged with the second serrated cutterand the gripping cylinder, and a housing which supports the foldingcylinder, first and second serrated cutters, gripping cylinder and twoconveyors and which is. installed turnably at certain angles withrespect to the path of the web. The object of the invention is toprovide a folding apparatus of an extremely simplified constructionwhich is free from the disadvantages of the conventional arrangements,in which two tiangular formers and two serrated cutters are provided andthe housing that supports the serrated cutters, folding cylinders,gripping cylinder, etc. can be turned as a whole at certain angles. 8

According to the present invention, as above stated, the firsttriangular former and the second triangular former crossing the same arearranged along the path of the web that comes out as from a rotarypress, the

, second serrated cutter is located on the other side of the foldingcylinder, the housing is made turnable at certain angles with respect tothe path of the web, and the folding blades of the folding cylinderandthe grippers of the gripping cylinder are designed so that theiroperations can be stopped as desired. This folderconstruction enablesthe web to be folded into 8 pages as it simply passes along the firstand second triangular formers. The folded paper is then led by way ofthe first serrated cutter and the folding cylinder simultaneously ontwo, lines, i.e., one line consisting of the second serrated cutter andthe associated conveyor, and the other line consisting of the grippingcylinder and the associated conveyor, to be delivered out as 8-pagesections.

Thus it is not necessary, as on a conventional apparatus, to conveyprefolded sections accurately and orderly to a preset point of theright-angled folder installed on the path of conveyance of the sections.This means that the speed at which the sections are conveyed, or themachine speed, need not be low. The web is folded exactly by the tensionof the running paper itself as it passesalong the first and secondtriangular formers. Moreover, because the advancing direction of .theweb is changed by turning the folding apparatus itself at a certainangle from the given position, the turn bar or the like which iscustomarily used to alter the path of the webcan be dispensed with andhence any staining of the printed surface or meandering of the webacross its width is avoided. Thus, in conformity with the presentinvention, S-page sections can be obtained accurately at a high speed.The simultaneous delivery of the sections in two lines, furthermore,helps the apparatus attain a high efficiency.

Since the second serrated cutter is supported by an eccentric bearing insuch a manner that it can be moved into and out of contact with thefolding cylinder, the folding apparatus according to this invention canproduce l6-page sections just as by ordinary folders. For that purposethe apparatus as a whole is turned to a position at a right angle to thepath of the web, and the second serrated cutter is disengaged from thefolding cylinder so that the transfer of sections to the cutter isdiscontinued while, at the same time, the web is passed along the firsttriangular former. With such an extremely simple operation, l6-pagesections can be formed on a single unit of folding apparatus. Thus, thepresent invention has great practical advantages in that it permitsfolding of paper into sections as desired with a limited initialinvestment and a minimum of labor.

FIG. 1 is a diagrammatic view explanatory of an embodiment of thisinvention;

FIGS. 2 and 3 are perspective views illustrating the relative positionsof first and second triangular formers and folding arrangement inoperation, FIG. 2 showing the folding arrangement located normal to thedirection in which web is fed to produce the same sections as by aconventional arrangement, and

FIG. 3 showing the same folding arrangement of FIG. 2 turned at an angleof 90 from the position of FIG. 2; and

FIG. 4 is a schematic view explanatory of the operating principles ofthe embodiment.

The present invention will be better understood from the followingdetailed description taken in conjunction with the accompanying drawingsshowing an embodiment thereof. In FIG. 1, a first triangular former 1 isshown located at the leading end of web in the same way as in aconventional folding apparatus. The web runs, by its own tension, alongthe triangular former l and the front end portion is continuously foldedinto two. A second triangular former 2, generally of the sameconstruction as the first triangular former l, is located therebelow insuch a position as to cross the first triangular former l substantiallyat right angles thereto. In the manner to be described later, the webfolded by the first triangular former 1 is again folded into two as itpasses along the second triangular former 2. The web thus reduced toabout a quarter of the original width is fed downward. Groups of niprollers 3, 3 are arranged, respectively, below the firs and secondtriangular formers 1, 2. They pull the web downstream of the triangularformers 1, 2 so as to give tension to the web and also set the folds ofthe web already folded by the triangular formers.

Numeral 4 denotes a serrated cutter of a known design equipped withserrations 11 on the circumference and which constitutes a firstserrated cutter. Numeral 5 designates a folding cylinder which, like anordinary folding cylinder, carries on the circumference first and secondserration receivers 6, 9, needles 7 and folding blades 8, in such amanner that needles 7 and folding blades 8 can be urged out or into thecylinder body by suitable cam means.

A serrated cutter 10 to constitute a second serrated cutter is providedwith serrations 11 and needles 7' which can be urged out or into thecylinder body by suitable cam means. This secon serrated cutter isattached to the housing 21 engageably with the folding cylinder 5 in themanner to be described later. As spindle 12 for the second serratedcutter 10 is borne by an eccentric bearing 13, so that the secondserrated cutter 10 can be moved inot or out of contact with the foldingcylinder 5 by the combined action of a pressure-fluid cylinde 14 and aconnecting rod 15 interposed between the eccentric bearing 13 and thehousing.

A gripping cylinder 16 has on the circumference grippers 17 of the knowntype as well as needles 7" similar to the needles 7, 7' which areprovided, respectively, on the circumferences of the folding cylinder 5and the second serrated cutter 10 in such a manner as to come out orinto the respective cylinder bodies. Two pairs of conveyors I8, 19 areextended to regions above the second serrated cutter 10 and the grippingcylinder 16, respectively. Each pair holds and carries the 8-pagesections formed by the preceding cylinders toward sub.- sequentstations. A right-angle folding unit 20 of a known design is disposed onthe path of the conveyor 19. A pivotal shaft 22 is provided for thehousing 21 of 4 the folding apparatus that supports the components abovedescribed. Shown at 23 is a bearing and at 24 is a toothed wheel formedon the underside of the housing 21. The toothed wheel 24 is in mesh witha toothed wheel 26 adapted to be driven by a motor 25 installed on thefloor. Instead of these toothed wheels 24, 26, a power transmissionmechanism of chain-sprocket type may be employed. Rollers 27 secured tothe underside of the housing 21 bear the total weight of the foldingapparatus and also serve to guide the turning of the apparatus in theway to be described later. Although in this embodiment the secondserrated cutter 10 is brought into and out of engagement with thefolding cyliner 5 by means of the pressure-fluid cylinder 14 whichcauses rotation of the eccentric bearing, the cylinder 14 may bereplaced by a gear driving mechanism having gear in mesh with a gear inplace of the eccentric bearing (13).

MODE FOR PRODUCING TWO STREAMS OF EIGHT PAGE SECTIONS The operation ofthe embodiment constructed in the manner so far described will now beexplained with reference to FIGS. 3 and 4. i

Web end that comes out of a rotary press (not shown) is, in the firstplace, folded into two by the first triangular former 1 and is guided byhand to the second triangular former 2 thereby to be again folded intotwo, and then is led to the nip between the first serrated cutter 4 andthe folding cylinder 5. Once the web end has been threaded in this wayinto the nip between the first serrated cutter 4 and the foldingcylinder 5, the web automatically passes along the first and secondtriangular formers 1, 2 and through the nip between the first serratedcutter 4 and the folding cylinder 5'where it is cut off through theco-operation of serration 11 on serrated cutter 4 and serration receiver6 on folding cylinder 5, and at the same time, the cut leading edge iscaught by the needles 7 on the folding cylinder 5. Thus, web is fedalong the surface of the folding cylinder 5 and as the folding cylinder5 totates, the cutting operation and feeding of the web are continuouslyrepeated. Therefore, serrations l1, and serration receivers 6 andneedles 7 are so arranged on the serration cutter 4 and on the foldingcylinder 5v that they meet cooperatively.

When the middle line of the cut web, carried by the needles 7 with thefolding cylinder 5, having 8-pages and being two-times longer than thefinally expected products, comes to the nip between folding cylinder and2nd serrated cutter, it is cut off into two sections through theco-operation of the serration 11 on the second serrated cutter l0 andthe serration receiver 9. In this case, also, the leading edge of thetrailing section is caught by the needles 7, on the second serratedcutter 10. The serrations 11, and needles 7', and serration receivers 9are soarranged on the 2nd serration cutter 10 and the folding cylinder 5that the meet cooperatively. The preceding section is yet carried by theneedles 7 on folding cylinder 5 and when its leading edges comes to thenip between the folding cylinder 5 and the gripping cylinder 16, theneedles 7 are urged into the folding cylinder 5 by the same means and atthe same time the needles 7" are urged out of the gripping cylinder 16and catch the the sections. Thus, the preceding sections, having 8-pages and desired size, are delivered via gripping cylinder 16 andconveyor 19.

On the other hand, the trailing sections are having 8- pages and desiredsize, are delivered via the second serration cutter l and the conveyor18.

The positions of the needles 7' and serrations 11 on the second serratedcutter l0 and the matching positions of the serrations receivers 9 onthe folding cylinder that correspond to the serrations 1 l, and also theoperative relations between the needles 7' and serrations 1 1' areprearranged by adjusting the relative positions of the folding cylinder5, gripping cylinder 16 and second serrated cutter 10, controlling theoperation timing and the actuation of cams not shown in order housing 21of the embodiment above described is capable. of being'turned at'anangle of 90 with respect to that the slitted paper caught by the needles7 of the tracted by suitable cam means (not shown).

MODE FOR PRODUCING ONE STREAM OF 16 PAGE SECTIONS As already stated, thesecond serrated cutter of the embodiment is built engageably with thefolding cylinder 5, and the folding apparatus as a unit can be turned atan angle of 90 from a given position because the housing2l is turnableitself. This construction not merely permits production of 8-pagesections in two lines but, in addition, renders it possible to obtain16- page sections where necessary in the same fashion as on aconventional equipment. The operation for the latter case will bebriefly explained hereunder in conjunction with FIGS. 2 and 4. First,the housing 2l'is turned 90 about the pivotal shaft 22 in the directionindicated by an arrow A in FIG. 2, to a position normal to the directionwherein the web is being introduced. At the same time, the secondserrated cutter 10 is disengaged from the folding cylinder 5 to theposition indicated by an alternate long and two short dashes line inFIG. 4. Following this, the web is led from the first triangular former1 directly into the nip between the folding cylinder 5 and the firstserrated cutter 4, by-

passing the second triangular former 2, and the web is thereby allowedto be automatically fed from the rotary press. It is then possible toobtain-l-page sections in much the same way as with a conventionalequipment. In this case, of course, the folding blades 8 on the foldingcylinder 5 are caused to function, while the needles 7" on the grippingcylinder 16 are kept inoperative that is, when the middle line of thecut web, carried by the needles 7 with the folding cylinder 5, having4-page and two-times longerand wider than finally expected products,comes to the nip between folding cylinder 5 and gripping cylinder 16,the folding blade 8 urges out of the cylinder surface and through theco-operation of this folding blade 8 and gripper 17, the cut web isgripped by the gripper 17, being folded into half and carried viagripping cylinder 16 and conveyor 19 to the right-angle folder 20, wherethe section is subjected to right-angle fold, thus being producedl6-page section. The right-angle folding unit 20 may be shifted for useaccording to the necessity. As explained in connection with thisembodiment, the folding apparatus of this invention makes it possible toobtain 8 -page sections simultaneously in two rows on a single machineand also obtain, if necessary, l6-page sections as on ordinaryapparatus, thus attaining high productivity and economy of labor withlow initial investment to excellent practical advantage. It is to beadded that, although the the path of the web, the housing 21 is notalways required to be turnable at the angle of Thus the rnachinedisclosed herein has two modes of operation: one is explained in thespecification with reference to FIG. 2 and the other is explained withreference to FIG. 3. The machine itself is best understood from FIG. 1.Some of the elements of the machine, such as the folding cylinder andthe rightangle folding units are individually per se conventional. Theirstructure and usual operation are well known to those skilled in theart. Accordingly, the explaination of this specification identifiesthese elements (b) explains how they are organized in combination and(c) concentrates on what differs from that which are skilled in the artwould normally expect. r

In the first mode of operation, explained with respect to Fig. 3 theincoming web is manufactured into twice as many eight page sections ofthe same page size as the 16 page sections produced when operating inthesec- 0nd mode explained with respect to FIG. 2.

In brief, when operating in the FIG. 3 mode: the former 1 doubles theweb over about its longitudinal axis and the former 2 doubles theresulting webs about its longitudinal axis to produce a continuous webfor thicknesses thick (i.e., of 8 pages, it being usual in this industryto count the two sides of each thickness as individual pages). In thismode, the folding cylinder 5 does not fold anything, because its foldingarms 8 are kept inoperative. Instead, the first serrated cutter 4 cutsthe twice longitudinally folded web transversally into segments whichareeach twiceas long as the intended eight page sections. Then the secondserrated cutter it) cuts each of these segments transversally into twoeight page sections. Every other one of these eight page sections iscarried away by the conveyor 19. and alternate ones are carried-away bythe conveyor 18. The right angle folding units 20 are not operated inthis mode either.

When operating the machine in the FIG. 2. mode, the whole of theapparatus (but for the two formers l and 2 and the nip rolls 3) isrotated 90 about the axis 22. This causes'the former 2 to be bypassed.Accordingly, the former 1 doubles the web over about its longitudinalaxis to produce a continuous web two thicknesses thich (i.e., of 4pages). The second serrated cutter 10 is retracted at 14, 15 to aposition of inoperativeness. The first serrated cutter, as before, cutsthe once longitudinally folded web transversally into segments which areeach twice as loud and twice as wide as intended 16 page sections. Inthis mode, the folding cylinder 5 does fold: the arms 8 conventionallyfold each segment transversally into an eight page semi-finished productas long as, but twice as wide as the intended product. Since the element10 is sidelined, all the semi-finished product is carried to theconveyor 19. In this mode the conventional right angle folding unit 20does operate: it folds each segment longitudinally into a 16 pagesection.

What is claimed is:

1. Apparatus for selectively manufacturing either two streams of eightpage sections in a first mode of operation or one stream of vl6 pagesections in a second mode of operation, from a continuous web of paper,

- said apparatus comprising:

means for forwarding the web along a path;

a first triangular former positioned to interceptthe web and double theweb about the longituidnal axis thereof;

a second triangular former positioned downstream of the first triangularformer and oriented at a substantial angular disparity with respectthereto to intercept the once doubled web, only when said apparatus isoperating in the first mode thereof, for redoubling the once doubled webabout the longitudinal axis thereof;

a rotating transfer roll contiguous with said path,

downstream of said second triangular former, means on the rotatingtransfer roll for temporarily grasping the web, regardless of whetherthe web has been doubled once or twice, and for carrying what has beengrasped, on the periphery thereof, throughout somewhat short of acomplete revolution of the rotating transfer roll;

first serration means intermittently cooperable with the rotatingtransfer roll shortly downstream of where the web is grasped thereon bysaid grasping means, for transversally servicing the web, regardless ofwhether the web has been doubled once or twice, into segments each twiceas long as the page sections to be produced;

second serration means, intermittently cooperable wtih the rotatingtransfer roll angularly downstream of where the web is served with thefirst serration means, for tranversally severing each of said segmentsinto two eight page sections only when said apparatus is operating inthe first mode thereof;

a rotating gripper cylinder contiguous with said path angularlydownstream of where the second serration means severs each of thesegments into two eight page sections when the apparatus is operating inthe first mode thereof;

a first conveyor disposed to receive angularly trailing ones of saideight page sections from said second serration means; means on saidsecond serration means for removing said angularly trailing ones of saideight page sections from saie rotating transfer roll and for depositingthe sections so removed with the first conveyor to provide one of saidtwo streams of eight page sections;

a second conveyor disposed to receive angularly leading ones of saideight page sections from said gripper cylinder; means on said rotationgripper cylinder for removing said angularly leading ones of said eightpage sections from said rotating transfer roll and for depositing thesections so removed with the second conveyor to provide the other ofsaid two streams of eight page sections;

means for withdrawing the second serration means from cooperation withthe rotating transfer cylinder, so that when the apparatus is operatingin the second mode thereof the once doubled web remains severed intosegments each twice as long and twice as wide as the 16 page sections tobe produced while being carried by the rotating transfer roll and thefirst conveyor is thus isolated from the rotating transfer roll andreceives no sections;

transverse folding blade means on the rotating transfer roll,structured, positioned and operable only when the apparatus is operatingin the second mode thereof to double-over each segment transversallywhile each segment is being carried by the rotating transfer roll toprovide segments each as wide but still twice as long as the 16 pagesections to be produced;

and right angle folding unit means associated with the second conveyorfor doubling over each segment longitudinally to provide said 16 pagesegments from the last-mentioned segments transfered to the secondconveyor from the rotating transfer roll by the rotating grippingcylinder;

and means for angularly shifting the orientation of the once doubled webwith respect to the periphery of the transfer cylinder about thelongitudinal axis of the web to accomodate said path to whether thesecond triangular former is to be used (in the first mode) or bypassed(in the second mode);

said rotating transfer roll, said first serration means, said secondserration means, said rotating gripper cylinder, said first conveyor andsaid second conveyor all being mounted on said shifting means, whereby,but for extension and withdrawal of the second serration means andrendering said transverse folding blade means operative and inoperative,switching said apparatus from operating in said first mode to operatingin said second mode, and vice versa is substantially accomplished byshifting said shifting means through the amount of said angulardisparity.

2. The apparatus of claim 3 wherein said angular dis-

1. Apparatus for selectively manufacturing either two streams of eightpage sections in a first mode of operation or one stream of 16 pagesections in a second mode of operation, from a continuous web of paper,said apparatus comprising: means for forwarding the web along a path; afirst triangular former positioned to intercept the web and double theweb about the longituidnal axis thereof; a second triangular formerpositioned downstream of the first triangular former and oriented at asubstantial angular disparity with respect thereto to intercept the oncedoubled web, only when said apparatus is operating in the first modethereof, for redoubling the once doubled web about the longitudinal axisthereof; a rotating transfer roll contiguous with said path, downstreamof said second triangular former, means on the rotating transfer rollfor temporarily grasping the web, regardless of whether the web has beendoubled once or twice, and for carrying what has been grasped, on theperiphery thereof, throughout somewhat short of a complete revolution ofthe rotating transfer roll; first serration means intermittentlycooperable with the rotating transfer roll shortly downstream of wherethe web is grasped thereon by said grasping means, for transversallyservicing the web, regardless of whether the web has been doubled onceor twice, into segments each twice as long as the page sections to beproduced; second serration means, interMittently cooperable wtih therotating transfer roll angularly downstream of where the web is servedwith the first serration means, for tranversally severing each of saidsegments into two eight page sections only when said apparatus isoperating in the first mode thereof; a rotating gripper cylindercontiguous with said path angularly downstream of where the secondserration means severs each of the segments into two eight page sectionswhen the apparatus is operating in the first mode thereof; a firstconveyor disposed to receive angularly trailing ones of said eight pagesections from said second serration means; means on said secondserration means for removing said angularly trailing ones of said eightpage sections from saie rotating transfer roll and for depositing thesections so removed with the first conveyor to provide one of said twostreams of eight page sections; a second conveyor disposed to receiveangularly leading ones of said eight page sections from said grippercylinder; means on said rotation gripper cylinder for removing saidangularly leading ones of said eight page sections from said rotatingtransfer roll and for depositing the sections so removed with the secondconveyor to provide the other of said two streams of eight pagesections; means for withdrawing the second serration means fromcooperation with the rotating transfer cylinder, so that when theapparatus is operating in the second mode thereof the once doubled webremains severed into segments each twice as long and twice as wide asthe 16 page sections to be produced while being carried by the rotatingtransfer roll and the first conveyor is thus isolated from the rotatingtransfer roll and receives no sections; transverse folding blade meanson the rotating transfer roll, structured, positioned and operable onlywhen the apparatus is operating in the second mode thereof todouble-over each segment transversally while each segment is beingcarried by the rotating transfer roll to provide segments each as widebut still twice as long as the 16 page sections to be produced; andright angle folding unit means associated with the second conveyor fordoubling over each segment longitudinally to provide said 16 pagesegments from the last-mentioned segments transfered to the secondconveyor from the rotating transfer roll by the rotating grippingcylinder; and means for angularly shifting the orientation of the oncedoubled web with respect to the periphery of the transfer cylinder aboutthe longitudinal axis of the web to accomodate said path to whether thesecond triangular former is to be used (in the first mode) or bypassed(in the second mode); said rotating transfer roll, said first serrationmeans, said second serration means, said rotating gripper cylinder, saidfirst conveyor and said second conveyor all being mounted on saidshifting means, whereby, but for extension and withdrawal of the secondserration means and rendering said transverse folding blade meansoperative and inoperative, switching said apparatus from operating insaid first mode to operating in said second mode, and vice versa issubstantially accomplished by shifting said shifting means through theamount of said angular disparity.
 2. The apparatus of claim 3 whereinsaid angular disparity is 90* and the shifting means is constituted by amobile housing shiftable through 900*.